Personal care compositions

ABSTRACT

A personal care composition includes a structured cleansing phase; a benefit phase including triglycerides, a cationic deposition polymer, and anionic microcapsules; and a carrier; and methods relating thereto.

TECHNICAL FIELD

The present disclosure relates to personal care compositions thatinclude microcapsules and triglycerides; and methods relating thereto.

BACKGROUND

Cleansing the skin is an activity that has been done for millennia. Skincleansing and methods therefore have involved the utilization of soaps,body washes, and other personal care compositions. Personal carecompositions can be structured to suspend and stabilize dispersions ofbenefit agents while maintaining physical integrity of the compositions,and there are many ways to provide such structure. The ability toprovide structure can be an important property for such compositions,but it is also important for personal care compositions to have theability to rapidly become micellar upon dilution to clean the skin andto deposit benefit agents. Having too much structure in a compositioncan result in poor performance, but not having enough structure in acomposition can cause the product to be unstable. Further, achieving abalance between these two properties can be a difficult task.Furthermore, such personal care compositions also often includefragrances. Such fragrances may delight the user by providing afreshness feeling and may serve as a signal to the user that the productmay still be working or that the product is still present. Yet becauseof the volatility of many fragrances and/or habituation, a consumer maybe unable to notice the fragrance shortly after using/applying thepersonal care composition. Consequentially, it may be desirable to havetechnologies than improve the noticeability of fragrances in personalcare compositions while also providing structure to the personal carecomposition.

SUMMARY

A personal care composition comprising a structured cleansing phasecomprising about 2% to about 50% of an anionic surfactant and a benefitphase comprising triglycerides; from about 0.01% to about 2% of acationic deposition polymer; a plurality of anionic microcapsules; and acarrier.

A method of making a personal cleansing composition, the methodcomprising adding a premix, said premix comprising a plurality ofanionic microcapsules and a cationic deposition polymer to a mixturecomprising a structured cleansing phase comprising about 2% to about 50%of an anionic surfactant, a benefit phase comprising triglycerides, anda carrier to form a personal care composition.

BRIEF DESCRIPTION OF THE DRAWINGS

While the specification concludes with claims, it is believed that thesame will be better understood from the following description taken inconjunction with the accompanying drawings in which:

FIG. 1 is an image showing a dilution of 1 part of a personal carecomposition including 7% by weight of the composition of soybean oil to9 parts of water;

FIG. 2 is an image showing a dilution of 1 part of a personal carecomposition including 7% by weight of the composition of soybean oil and0.2% by weight of the composition of anionic microcapsules with acationic deposition polymer without premixing the microcapsules andpolymer (having a core material including a perfume oil and apolyacrylate wall material) to 9 parts of water that results in a lackof clusters of microcapsules;

FIG. 3 is an image showing a dilution of 1 part of a personal carecomposition including 7% by weight of the composition of soybean oil and0.2% by weight of the composition of non-ionic microcapsules (having acore material including a perfume oil and a polyacrylate wall material)to 9 parts of water that results in a lack of clusters of microcapsules;

FIG. 4 is an image showing a dilution of 1 part of a personal carecomposition including 7% by weight of the composition of soybean oil and0.2% by weight of the composition of cationic microcapsules (having acore material including a perfume oil and a polyacrylate wall material)to 9 parts of water that results in a lack of clusters of microcapsules;

FIG. 5 is an image showing a dilution of 1 part of a personal carecomposition including 7% by weight of the composition of soybean oil and0.2% by weight of the composition of anionic microcapsules (having acore material including a perfume oil and a wall material made frommelamine-formaldehyde condensates) to 9 parts of water that results inthe formation clusters of microcapsules, where the microcapsules andcationic polymer are formed into a premix; and

FIG. 6 is an image showing a dilution of 1 part of a personal carecomposition including 7% by weight of the composition of soybean oil and0.2% by weight of the composition of anionic microcapsules (having acore material including a perfume oil that is different from themicrocapsules used in FIG. 5 and a wall material made frommelamine-formaldehyde condensates) to 9 parts of water that results inthe formation of clusters of microcapsules, where the microcapsules andcationic polymer are formed into a premix.

DETAILED DESCRIPTION

While the specification concludes with the claims particularly pointingand distinctly claiming the invention, it is believed that the presentinvention will be better understood from the following description.

The devices, apparatuses, methods, components, and/or compositions ofthe present invention can include, consist essentially of, or consistof, the components of the present invention as well as other ingredientsdescribed herein. As used herein, “consisting essentially of” means thatthe devices, apparatuses, methods, components, and/or compositions mayinclude additional ingredients, but only if the additional ingredientsdo not materially alter the basic and novel characteristics of theclaimed devices, apparatuses, methods, components, and/or compositions.

All percentages and ratios used herein are by weight of the totalcomposition and all measurements made are at 25° C., unless otherwisedesignated.

All measurements used herein are in metric units unless otherwisespecified.

I. Definitions

As used herein, the following terms shall have the meaning specifiedthereafter:

“Anhydrous” refers to those compositions, and components thereof, whichare substantially free of water.

“Anionic microcapsules” refer to microcapsules with a zeta potential ofless than negative 0.5 millivolts as determined by the method describedherein.

“Associative polymer” refers to a water-dispersible polymer comprisinghydrophobic groups at an end or pendants to a hydrophilic backbone.

“Molecular weight” as used herein with respect to polymers refers to theweight average molecular weight unless otherwise specified.

“Multiphase” refers to compositions comprising at least two phases whichcan be chemically distinct (e.g., a structured cleansing phase and abenefit phase). Such phases can be in direct physical contact with oneanother. A personal care composition can be a multiphase personal carecomposition where phases of the personal care composition can be blendedor mixed to a significant degree, but still be physically distinct. Inthese situations, the physical distinctiveness is undetectable to thenaked eye. The personal care composition can also be a multiphasepersonal care composition where phases of the personal care compositioncan be made to occupy separate but distinct physical spaces inside apackage in which the phases can be stored. In such an arrangement, thephases can be stored such that they are not in direct contact with oneanother (i.e., the phases are not separated by a barrier and the phasesare not emulsified or mixed to any significant degree). The personalcare composition can also be a multiphase personal care compositionwhere the phases are in physical contact and are visually distinct.Visually distinct phases can take many forms (e.g., phases can appear asstriped, marbled). The personal care composition can also include acombination of one or more of the above multiphase personal carecompositions. In one such an arrangement, one blended multiphasepersonal care composition can be stacked with another blended multiphasepersonal care composition to form a striped configuration. Additionally,blended multiphase personal care compositions distinguishable by colorcan be stacked as stripes wherein the blended multiphase personal carecompositions can be otherwise similar in average composition.

“Non-associative polymer” refers to a water-dispersible polymer with arelatively uniform hydrophilic backbone lacking hydrophobic groups.

“Package” refers to any suitable container for a personal carecomposition including but not limited to a bottle, tottle, tube, jar,non-aerosol pump, and combinations thereof.

“Personal care composition” refers to compositions intended for topicalapplication to skin or hair. Personal care compositions can be rinse-offformulations, in which the product can be applied topically to the skinor hair and then subsequently rinsed within seconds to minutes from theskin or hair with water. The product could also be wiped off using asubstrate. In either case, it is believed at least a portion of theproduct is left behind (i.e., deposited) on the skin. The personal carecompositions can also be used as shaving aids. The personal carecompositions can be extrudable or dispensable from a package. Thepersonal care compositions can exhibit a viscosity of from about 1,500cP to about 1,000,000 cP as measured by a viscosity method as describedin the commonly owned, patent application published on Nov. 11, 2004under U.S. Publication No. 2004/0223991 A1 entitled, “MultiphasePersonal Care Compositions” filed on May 7, 2004 by Wei, et al. Thepersonal care compositions can be in the form of, for example, a liquid,semi-liquid cream, lotion, or gel and are intended for topicalapplication to the skin and/or hair. Examples of personal carecompositions can include but are not limited to bar soap, shampoo,conditioning shampoo, body wash, moisturizing body wash, shower gels,skin cleansers, cleansing milks, hair and body wash, in shower bodymoisturizer, pet shampoo, shaving preparations, and cleansingcompositions used in conjunction with a disposable cleansing cloth.

The term “premix” when used with respect to microcapsules refers to amixture that is formed by combining a plurality of anionic microcapsuleswith a cationic deposition polymer.

“STnS” refers to sodium trideceth(n) sulfate, wherein n can define theaverage number of moles of ethoxylate per molecule.

“Stable” refers to a personal care composition having a viscosity changeof about 30% or less from an initial viscosity value after being rapidlyaged for 10 days at 50° C.

“Structured” refers to having a rheology that can confer stability onthe personal care composition. A degree of structure can be determinedby characteristics determined by a Zero Shear Viscosity Method describedbelow. Accordingly, a structured cleansing phase of the personal carecomposition can be considered to be structured if the structuredcleansing phase has a Zero Shear Viscosity of about 20 Pascal-seconds(Pa-s) or more, about 200 Pa-s or more, about 500 Pa-s or more, about1,000 Pa-s or more, about 1,500 Pa-s or more, or about 2,000 Pa-s ormore. Other methods for determining characteristics which can define adegree of structure are described in U.S. Patent Application PublicationNo. 2012/0009285.

The phrase “substantially free of” as used herein, unless otherwisespecified means that the personal care composition comprises less thanabout 5%, less than about 3%, less than about 1%, or even less thanabout 0.1% of the stated ingredient. The term “free of” as used hereinmeans that the personal care composition comprises 0% of the statedingredient that is the ingredient has not been added to the personalcare composition. However, these ingredients may incidentally form as aby-product or a reaction product of the other components of the personalcare composition.

“Surfactant component” refers to a total of all anionic, nonionic,amphoteric, zwitterionic, and cationic surfactants in a phase. Whencalculations are based on the surfactant component, water andelectrolytes can be excluded from the calculations involving thesurfactant component since surfactants as manufactured can be dilutedand neutralized.

“Visually distinct” generally refers to a region of the multiphasepersonal care composition having one average composition, as distinctfrom another region having a different average composition, wherein theregions can be visible to the unaided naked eye. This would not precludedistinct regions from comprising two similar multiphase personal carecompositions or phases where one multiphase personal care composition orphase can comprise certain pigments, dyes, particles, and variousoptional ingredients, hence providing a region of different averagecomposition (e.g., different textures or different colors).

II. Personal Care Compositions

It has been surprisingly found that the development of clusters ofmicrocapsules is important for the deposition of microcapsules deliveredto a situs via a personal cleansing composition. In this regard, theformation of clusters of microcapsules upon dilution of the personalcleansing composition containing microcapsules may improve thedeposition of the microcapsules, and thereby lead to a more noticeablebloom from the microcapsules. It has been found that the formation ofclusters of microcapsules may be initiated by combining anionicmicrocapsules (microcapsules with a zeta potential of less than negative0.5 millivolts) with a cationic deposition polymer to form a premix. Ithas also surprisingly been found that the choice of benefit agent mayinfluence the development of clusters. In this regard, it has beensurprisingly found that the presence of a benefit agent comprisingtriglycerides may also increase the development of clusters, and therebyleading to an improvement in the performance of the microcapsules

A. Structured Cleansing Phase

As noted herein, a personal care composition can include a structuredcleansing phase and a benefit phase. The structured cleansing phase andthe benefit phase can be in physical contact. The phases can be blendedor mixed to a significant degree, but still be physically distinct suchthat the physical distinctiveness is undetectable to the naked eye. Thephases can also be made to occupy separate but distinct physical spacesinside a package in which the phases are stored. In such an arrangement,the structured cleansing phase and the benefit phase can be stored suchthat the phases are not in direct contact with one another. The phasescan also be in physical contact where the phases are visibly distinctwhich, for example, can give a striped or marbled configuration.

The personal care composition can include a combination of one or moreof the above multiphase personal care compositions. For example, oneblended multiphase personal care composition can be stacked as stripeswith another blended multiphase personal care composition.

The personal care composition of the present invention includes acleansing phase. The cleansing phase will comprise as least one anionicsurfactant. The surfactant may be present from about 3% to about 20%, byweight of the personal care composition. The cleansing phase may containfrom 3% to about 20%, from about 5% to about 15%, from about from about7% to about 15%, from about 5% to about 13%, or any combination of theupper, lower, and included limits within the ranges.

The cleansing phase may be structured. When structured, the cleansingphase is comprised of a structured domain. The structured domain ispreferably an opaque structured domain, which is preferably a lamellarphase. The lamellar phase can provide resistance to shear, adequateyield to suspend particles and droplets and at the same time providinglong term stability, since it is thermodynamically stable. The lamellarphase tends to have a viscosity that minimizes the need for viscositymodifiers, but they can be included if desired.

Anionic surfactants can be either linear or branched. Examples of somesuitable linear anionic surfactants include ammonium laureth sulfate,triethylamine lauryl sulfate, triethylamine laureth sulfate,triethanolamine lauryl sulfate, triethanolamine laureth sulfate,monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate,diethanolamine lauryl sulfate, diethanolamine laureth sulfate, lauricmonoglyceride sodium sulfate, sodium laureth sulfate, potassium laurethsulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate, laurylsarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, sodium cocoylisethionate, ammonium lauroyl sulfate, sodium cocoyl sulfate, sodiumlauroyl sulfate, potassium cocoyl sulfate, potassium lauryl sulfate,monoethanolamine cocoyl sulfate, sodium tridecyl benzene sulfonate,sodium dodecyl benzene sulfonate, and combinations thereof.

Examples of some suitable branched anionic surfactants include but arenot limited to the following surfactants: sodium trideceth sulfate,sodium tridecyl sulfate, sodium C₁₂₋₁₃ alkyl sulfate, sodium C₁₂₋₁₅alkyl sulfate, sodium C₁₁₋₁₅ alkyl sulfate, sodium C₁₂₋₁₈ alkyl sulfate,sodium C₁₀₋₁₆ alkyl sulfate, sodium C₁₂₋₁₃ pareth sulfate, sodium C₁₂₋₁₃pareth-n sulfate, sodium C₁₂₋₁₄ pareth-n sulfate, and combinationsthereof. Other salts of all the aforementioned surfactants are useful,such as TEA, DEA, ammonia, potassium salts. Useful alkoxylates includethe ethylene oxide, propylene oxide and EO/PO mixed alkoxylates.Phosphates, carboxylates and sulfonates prepared from branched alcoholsare also useful anionic branched surfactants. Branched surfactants canbe derived from synthetic alcohols such as the primary alcohols from theliquid hydrocarbons produced by Fischer-Tropsch condensed syngas, forexample Safol™ 23 Alcohol available from Sasol North America, Houston,Tex.; from synthetic alcohols such as Neodol™ 23 Alcohol available fromShell Chemicals, USA; from synthetically made alcohols such as thosedescribed in U.S. Pat. No. 6,335,312 issued to Coffindaffer, et al onJan. 1, 2002. Preferred alcohols are Safol™ 23 and Neodol™ 23. Preferredalkoxylated alcohols are Safol™ 23-3 and Neodol™ 23-3. Sulfates can beprepared by conventional processes to high purity from a sulfur basedSO₃ air stream process, chlorosulfonic acid process, sulfuric acidprocess, or Oleum process. Preparation via SO₃ air stream in a fallingfilm reactor is a preferred sulfation process.

The anionic surfactant may also be STnS, wherein n can define averagemoles of ethoxylation. A structured cleansing phase can include fromabout 5% to about 20%, by weight of the personal care composition, ofSTnS. n can range from about 0 to about 3, from about 0.5 to about 2.7,from about 1.1 to about 2.5, from about 1.8 to about 2.2, or n can beabout 2. When n is less than 3, STnS can provide improved stability,improved compatibility of benefit agents within the personal carecompositions, and increased mildness of the personal care compositions,such described benefits of STnS are disclosed in U.S. Patent ApplicationPublication No. 2012/0009285.

Further, the structured cleansing phase can comprise a structuringsystem, wherein the structuring system can comprise an associativepolymer and a non-associative polymer. The structuring system cancomprise from about 0.01% to about 5%, from about 0.05% to about 1%,from about 0.07% to about 0.5%, or from about 0.1% to about 0.3%, byweight of the personal care composition, of a non-associative polymer.The structuring system can comprise from about 0.001% to about 5%, fromabout 0.005% to about 0.5%, from about 0.007% to about 0.05%, from about0.008% to about 0.04%, or from about 0.01% to about 0.03%, by weight ofthe personal care composition, of an associative polymer. As notedherein, stability of a personal care composition can be maintained orenhanced even with the reduction of associative polymer with theaddition of a non-associative polymer.

Such associative polymers can be a crosslinked, alkali swellable,associative polymer comprising acidic monomers and associative monomerswith hydrophobic end groups, whereby the associative polymer comprises apercentage hydrophobic modification and a hydrophobic side chaincomprising alkyl functional groups. Without intending to be limited bytheory, it is believed the acidic monomers can contribute to an abilityof the associative polymer to swell in water upon neutralization ofacidic groups; and associative monomers anchor the associative polymerinto structured surfactant hydrophobic domains, e.g., lamellae, toconfer structure to the surfactant phase and keep the associativepolymer from collapsing and losing effectiveness in a presence of anelectrolyte. The crosslinked, associative polymer can comprise apercentage hydrophobic modification, which is a mole percentage ofmonomers expressed as a percentage of a total number of all monomers ina polymer backbone, including both acidic and other non-acidic monomers.Percentage hydrophobic modification of the associative polymer,hereafter % HM, can be determined by the ratio of monomers added duringsynthesis, or by analytical techniques such as proton nuclear magneticresonance (NMR). Associative alkyl side chains can comprise, forexample, butyl, propyl, stearyl, steareth, cetyl, lauryl, laureth,octyl, behenyl, beheneth, steareth, or other linear, branched,saturated, or unsaturated alkyl or alketh hydrocarbon side chains.

Associative polymers having certain % HM and certain carbon numbers ofhydrophobic end groups of alkyl side chains may also provide significantenhancement of structure to structured surfactant compositions,especially to compositions comprising reduced levels of surfactant. Suchassociative polymers can also provide the above structure atsurprisingly low levels of polymer structurant. Concentrations ofassociative polymer of up to about 5% or even 10% are taught in the artto obtain a sufficient amount structure (e.g., exemplary compositions ofU.S. Pat. No. 7,119,059 (Librizzi, et al.) and U.S. Pat. No. 6,897,253(Schmucker-Castner, et al.). Inventors have found when associativepolymer % HM and an alkyl side chain number of carbons can be optimized,structure of an aqueous structured surfactant phase can be increasedusing only less than about 3 wt %, less than about 2%, less than about1%, and less than about 0.2%, of an associative polymer, as a percentageof an aqueous structured surfactant phase.

The acidic monomer can comprise any acid functional group, for examplesulfate, sulfonate, carboxylate, phosphonate, or phosphate or mixturesof acid groups. The acidic monomer can comprise, for example, acarboxylate, alternatively the acidic monomer is an acrylate, includingacrylic acid and/or methacrylic acid. The acidic monomer comprises apolymerizable structure, e.g., vinyl functionality. Mixtures of acidicmonomers, for example acrylic acid and methacrylic acid monomermixtures, are useful.

The associative monomer can comprise a hydrophobic end group and apolymerizable component, e.g., vinyl, which can be attached. Thehydrophobic end group can be attached to the polymerizable component,hence to the polymer chain, by different means but can be attached by anether or ester or amide functionality, such as an alkyl acrylate or avinyl alkanoate monomer. The hydrophobic end group can also be separatedfrom the chain, for example, by an alkoxy ligand such as an alkyl ether.The associative monomer can be, for example, an alkyl ester, analkyl(meth)acrylate, where (meth)acrylate is understood to mean eithermethyl acrylate or acrylate, or mixtures of the two.

Sometimes, the hydrophobic end group of the associative polymer can beincompatible with the aqueous phase of the composition and can associatewith lathering surfactant hydrophobe components. Without intending to belimited by theory, it is believed that longer alkyl chains ofstructuring polymer hydrophobe end groups can increase incompatibilitywith the aqueous phase to enhance structure, whereas somewhat shorteralkyl chains having carbon numbers closely resembling latheringsurfactant hydrophobes (e.g., 12 to 14 carbons) or multiples thereof(for bilayers, e.g.) can also be effective. An ideal range ofhydrophobic end group carbon numbers combined with an optimal percentageof hydrophobic monomers expressed as a percentage of the polymerbackbone can provide increased structure to the lathering, structuredsurfactant composition at low levels of polymer structurant.

An exemplary associative polymer can include AQUPEC® SER-300 made bySumitomo Seika of Japan, which is an acrylate/C₁₀-C₃₀ alkyl acrylatecross-polymer and comprises stearyl side chains with less than about 1%HM. Associative polymers can comprise about C₁₆ (cetyl) alkylhydrophobic side chains with about 0.7% hydrophobic modification, but apercentage hydrophobic modification can be up to an aqueous solubilitylimit in surfactant compositions (e.g., up to 2%, 5%, or 10%). Otherassociative polymers can include stearyl, octyl, decyl and lauryl sidechains, alkyl acrylate polymers, polyacrylates, hydrophobically-modifiedpolysaccharides, hydrophobically-modified urethanes, AQUPEC® SER-150(acrylate/C₁₀-C₃₀ alkyl acrylate cross-polymer) comprising about C₁₈(stearyl) side chains and about 0.4% HM, and AQUPEC® HV-701EDR whichcomprises about C₈ (octyl) side chains and about 3.5% HM, and mixturesthereof. Another exemplary associative polymer can be Stabylen 30manufactured by 3V Sigma S.p.A., which has branched isodecanoatehydrophobic associative side chains.

As set forth above, the structured cleansing phase of a personal carecomposition can further include a non-associative polymer. Suitablenon-associative polymers can include water-dispersible polymers withrelatively uniform hydrophilic backbone lacking hydrophobic groups.Examples of non-associative polymers can include biopolymerpolysaccharides (e.g., xanthan gum, gellan gum), cellulosicpolysaccharides (e.g., carboxymethyl cellulose, carboxymethylhydroxyethyl cellulose), other polysaccharides (e.g., guar gum,hydroxypropyl guar, and sodium alginate), and synthetic hydrocarbonpolymers (e.g., polyacrylamide and copolymers, polyethylene oxide,polyacrylic acid copolymers).

Personal care compositions can additionally comprise a cationicdeposition polymer in one or more phases as a deposition aid for benefitagents described herein. Non-limiting examples include those polymersdisclosed in U.S. Pat. No. 6,649,155; U.S. Pat. No. 8,349,300; U.S.Patent Publication 2008/0206355; and U.S. Patent Publication No.2006/0099167A1. The personal cleansing composition may comprise acationic deposition polymer that forms a premix when added to theanionic microcapsules. The cationic deposition polymer may be includedin the composition at a level from about 0.01% to about 2%,alternatively from about 1.5% to about 1.9%, alternatively from about1.8% to about 2.0%. The cationic deposition polymer may be a watersoluble polymer with a charge density from about 0.5 milliequivalentsper gram to about 12 milliequivalents per gram. The cationic depositionpolymer used in the composition may have a molecular weight of about100,000 Daltons to about 5,000,000 Daltons. The cationic depositionpolymer may be a low charge density cationic polymer.

The cationic deposition polymer may be a synthetic cationic depositionpolymer. A variety of synthetic cationic deposition polymers can be usedincluding mono- and di-alkyl chain cationic surfactants. In someexamples, mono-alkyl chain cationic surfactants are chosen including,for example, mono-alkyl quaternary ammonium salts and mono-alkyl amines.In some examples, di-alkyl chain cationic surfactants are used andinclude, for example, dialkyl (14-18) dimethyl ammonium chloride,ditallow alkyl dimethyl ammonium chloride, dihydrogenated tallow alkyldimethyl ammonium chloride, distearyl dimethyl ammonium chloride,dicetyl dimethyl ammonium chloride, and mixtures thereof.

The cationic deposition polymer may be a naturally derived cationicpolymer. The term, “naturally derived cationic polymer” as used herein,refers to cationic deposition polymers which are obtained from naturalsources. The natural sources include polysaccharide polymers. Therefore,the naturally derived cationic polymer may be selected from the groupconsisting of starches, guar, cellulose, Cassia, locust bean, Konjac,Tara, galactomannan, tapioca, and synthetic polymers. In a furtherembodiment, cationic deposition polymers are selected from Mirapol 100S(Rhodia), Jaguar C17, polyDADMAC, Tapioca starch (Akzo), polyTriquat,and mixtures thereof.

The personal care composition can be optionally free of sodium laurylsulfate, hereinafter SLS, and can comprise at least a 70% lamellarstructure. However, in an alternative arrangement, the structuredcleansing phase can comprise at least one surfactant, wherein the atleast one surfactant includes SLS. Suitable examples of SLS aredescribed in U.S. Patent Application Publication No. 2010/0322878.

A personal care composition can further comprise from about 0.1% to 20%,by weight of the personal care composition, of a cosurfactant.Cosurfactants can comprise amphoteric surfactants, zwitterionicsurfactants, or mixtures thereof. A personal care composition caninclude an amphoteric surfactant and/or a zwitterionic surfactant.Suitable amphoteric or zwitterionic surfactants can include thosedescribed in U.S. Pat. Nos. 5,104,646 and 5,106,609.

Amphoteric surfactants can include those that can be broadly describedas derivatives of aliphatic secondary and tertiary amines in which analiphatic radical can be straight or branched chain and wherein analiphatic substituent can contain from about 8 to about 18 carbon atomssuch that one carbon atom can contain an anionic water solubilizinggroup, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate.Examples of compounds falling within this definition can be sodium3-dodecyl-aminopropionate, sodium 3-dodecylaminopropane sulfonate,sodium lauryl sarcosinate, N-alkyltaurines such as the one prepared byreacting dodecylamine with sodium isethionate according to the teachingof U.S. Pat. No. 2,658,072, N-higher alkyl aspartic acids such as thoseproduced according to the teaching of U.S. Pat. No. 2,438,091, andproducts described in U.S. Pat. No. 2,528,378. Other examples ofamphoteric surfactants can include sodium lauroamphoacetate, sodiumcocoamphoacetate, disodium lauroamphoacetate disodiumcocodiamphoacetate, and mixtures thereof. Amphoacetates anddiamphoacetates can also be used.

Zwitterionic surfactants suitable for use can include those that arebroadly described as derivatives of aliphatic quaternary ammonium,phosphonium, and sulfonium compounds, in which aliphatic radicals can bestraight or branched chains, and wherein an aliphatic substituent cancontain from about 8 to about 18 carbon atoms such that one carbon atomcan contain an anionic group, e.g., carboxy, sulfonate, sulfate,phosphate, or phosphonate. Other zwitterionic surfactants can includebetaines, including cocoamidopropyl betaine.

Other suitable surfactants or cosurfactants that can generally be usedin a structured cleansing phase for a personal care composition aredescribed in McCutcheon's: Detergents and Emulsifiers North AmericanEdition (Allured Publishing Corporation 1947) (1986), McCutcheon's,Functional Materials North American Edition (Allured PublishingCorporation 1973) (1992) and U.S. Pat. No. 3,929,678 (filed Aug. 1,1974).

The structured cleansing phase of the personal care composition can alsocomprise water. The structured cleansing phase of the personal carecomposition can comprise from about 10% to about 90%, from about 40% toabout 85%, or from about 60% to about 80%, by weight of the personalcare composition, of water.

Other optional additives can be included in the cleaning phase,including for example an emulsifier (e.g., non-ionic emulsifier) andelectrolytes. Suitable electrolytes can includes an anion such asphosphate, chloride, sulfate, citrate, and mixtures thereof and a cationsuch as sodium, ammonium, potassium, magnesium, and mixtures thereof.For example, suitable electrolytes can include sodium chloride, ammoniumchloride, sodium sulfate, ammonium sulfate, and mixtures thereof. Othersuitable emulsifiers and electrolytes are described in U.S. PatentApplication Publication No. 2012/0009285.

B. Benefit Phase

As noted herein, personal care compositions can include a benefit phase.The benefit phase can be hydrophobic and/or anhydrous. The benefit phasecan also be substantially free of or free of surfactant. The benefitphase can also include one or more benefit agents. In particular, thebenefit phase can comprise from about 0.1% to about 50%, by weight ofthe personal care composition, of a benefit agent.

In some examples, the benefit phase includes triglycerides. In someexamples, the triglyceride is provided as triglyceride oil. Non-limitingexamples of triglyceride oils include olive oil, sunflower oil, soybeanoil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, palmkernel oil, and mixtures thereof.

In some examples, the benefit phase may also include one or more offollowing at levels that do not impair the development of the clustersof the microcapsules: castor oil, mineral oil, paraffin oil, petrolatum,lanolin and derivatives thereof, volatile and non-volatileorganosiloxanes, waxes like montan wax, ceresine, a microcrystallinewax, hydroxyoctacosanyl hydroxystearate, beeswax, synthetic beeswax, andsilicone wax.

C. Carrier

The compositions herein may be in the form of pourable liquids (underambient conditions). Such compositions will therefore typically comprisea carrier, which may be present at a level of from about 20% to about95%, or even from about 60% to about 85%. The carrier may comprisewater, or a miscible mixture of water and organic solvent, and in someaspects may comprise water with minimal or no significant concentrationsof organic solvent, except as otherwise incidentally incorporated intothe composition as minor ingredients of other essential or optionalcomponents.

The carrier may include water and/or water solutions of lower alkylalcohols and polyhydric alcohols. The lower alkyl alcohols useful hereinare monohydric alcohols having 1 to 6 carbons, in one aspect, ethanoland isopropanol. The polyhydric alcohols useful herein include propyleneglycol, hexylene glycol, glycerin, and propane diol.

D. Microcapsules

The personal care compositions herein may include microcapsules in thecleansing and/or benefit phases. The microcapsules may be any kind ofmicrocapsule disclosed herein or known in the art. The microcapsules mayhave a shell and a core material encapsulated by the shell. The corematerial of the microcapsules may include one or more fragrances. Theshells of the microcapsules may be made from synthetic polymericmaterials or naturally-occurring polymers. Synthetic polymers may bederived from petroleum oil, for example. Non-limiting examples ofsynthetic polymers include nylon, polyethylenes, polyamides,polystyrenes, polyisoprenes, polycarbonates, polyesters, polyureas,polyurethanes, polyolefins, polysaccharides, epoxy resins, vinylpolymers, polyacrylates, and mixtures thereof. Natural polymers occur innature and may often be extracted from natural materials. Non-limitingexamples of naturally occurring polymers are silk, wool, gelatin,cellulose, proteins, and combinations thereof.

The microcapsules may be friable microcapsules. A friable microcapsuleis configured to release its core material when its shell is ruptured.The rupture may be caused by forces applied to the shell duringmechanical interactions. The microcapsules may have a shell with avolume weighted fracture strength of from about 0.2 mega Pascals toabout 15.0 mega Pascals, when measured according to the FractureStrength Test Method described herein, or any incremental valueexpressed in 0.1 mega Pascals in this range, or any range formed by anyof these values for fracture strength. As an example, a microcapsule mayhave a shell with a volume weighted fracture strength of 0.8-15.0 megaPascals (MPa), alternatively from 5.0-12.0 mega Pascals (MPa), oralternatively from 6.0-10.0 mega Pascals (MPa).

The microcapsules may have a median volume-weighted particle size offrom 2 microns to 80 microns, from 10 microns to 30 microns, or from 10microns to 20 microns. The microcapsules may have various core materialto shell weight ratios. The microcapsules may have a core material toshell ratio that is greater than or equal to: 70% to 30%, 75% to 25%,80% to 20%, 85% to 15%, 90% to 10%, and 95% to 5%.

The microcapsules may have shells made from any material in any size,shape, and configuration known in the art. Some or all of the shells mayinclude a polyacrylate material, such as a polyacrylate randomcopolymer. For example, the polyacrylate random copolymer may have atotal polyacrylate mass, which includes ingredients selected from thegroup including: amine content of 0.2-2.0% of total polyacrylate mass;carboxylic acid of 0.6-6.0% of total polyacrylate mass; and acombination of amine content of 0.1-1.0% and carboxylic acid of 0.3-3.0%of total polyacrylate mass.

When a microcapsule's shell includes a polyacrylate material, and theshell has an overall mass, the polyacrylate material may form 5-100% ofthe overall mass, or any integer value for percentage in this range, orany range formed by any of these values for percentage. As examples, thepolyacrylate material may form at least 5%, at least 10%, at least 25%,at least 33%, at least 50%, at least 70%, or at least 90% of the overallmass.

Some or all of the microcapsules may have various shell thicknesses. Forat least a first group of the provided microcapsules, each microcapsulemay have a shell with an overall thickness of 1-300 nanometers, or anyinteger value for nanometers in this range, or any range formed by anyof these values for thickness. As an example, microcapsules may have ashell with an overall thickness of 2-200 nanometers.

The microcapsules may also encapsulate one or more benefit agents. Thebenefit agent(s) include, but are not limited to, cooling sensates,warming sensates, fragrances, oils, pigments, phase change materials,and other kinds of benefit agent known in the art, in any combination.In some examples, the fragrance encapsulated may have a C log P of lessthan 4.5 or a C log P of less than 4. Alternatively the fragranceencapsulated may have a C log P of less than 3. In some examples, themicrocapsule may be anionic, cationic, zwitterionic, or have a neutralcharge. The benefit agents(s) may be in the form of solids and/orliquids. The benefit agent(s) may be any kind of fragrance(s) known inthe art, in any combination.

The microcapsules may encapsulate a partitioning modifier in addition tothe benefit agent. Non-limiting examples of partitioning modifiersinclude mono, di- and tri-esters of C₄-C₂₄ fatty acids and glycerin;isopropyl myristate, soybean oil, hexadecanoic acid, methyl ester,isododecane, and combinations thereof, in addition to the encapsulated.The oil soluble material may have a C log P about 4 or greater, at least5 or greater, at least 7 or greater, or at least 11 or greater.Microcapsules may also have varying ratios of the partitioning modifierto the benefit so as to make different populations of microcapsules thatmay have different bloom patterns. Such populations may also incorporatedifferent perfume oils so as to make populations of microcapsules thatdisplay different bloom patterns and different scent experiences.

The microcapsule's shell may comprise a reaction product of a firstmixture in the presence of a second mixture comprising an emulsifier,the first mixture comprising a reaction product of i) an oil soluble ordispersible amine with ii) a multifunctional acrylate or methacrylatemonomer or oligomer, an oil soluble acid and an initiator, theemulsifier comprising a water soluble or water dispersible acrylic acidalkyl acid copolymer, an alkali or alkali salt, and optionally a waterphase initiator. In some examples, said amine is an aminoalkyl acrylateor aminoalkyl methacrylate.

The microcapsules may include a core material and a shell surroundingthe core material, wherein the shell comprises: a plurality of aminemonomers selected from the group consisting of aminoalkyl acrylates,alkyl aminoalkyl acrylates, dialkyl aminoalkyl acrylates, aminoalkylmethacrylates, alkylamino aminoalkyl methacrylates, dialkyl aminoalkylmethacrylates, tertiarybutyl aminethyl methacrylates, diethylaminoethylmethacrylates, dimethylaminoethyl methacrylates, dipropylaminoethylmethacrylates, and mixtures thereof; and a plurality of multifunctionalmonomers or multifunctional oligomers.

Processes for making microcapsules are well known. Various processes formicroencapsulation, and exemplary methods and materials, are set forthin U.S. Pat. No. 6,592,990; U.S. Pat. No. 2,730,456; U.S. Pat. No.2,800,457; U.S. Pat. No. 2,800,458; U.S. Pat. No. 4,552,811; and U.S.2006/0263518 A1. U.S. Patent Publication Nos. 2012/0276175,2011/0268802, 2011/0269657, 2011/0269658, 2011/268778 are also herebyincorporated by reference.

In some examples, the microcapsules may be made by using a processcomprising the steps of: 1) preparing an oligomeric compositioncomprising the reaction product of, or obtainable by reacting together:a) a polyamine component in the form of melamine or of a mixture ofmelamine and at least one C1-4 compound comprising two NH2 functionalgroups; b) an aldehyde component in the form of a mixture of glyoxal, aC₄ _(_) ₆ 2,2-dialkoxyethanal and optionally a glyoxalate, said mixturehaving a molar ratio glyoxal/C₄ _(_) ₆ 2,2-dialkoxy-ethanal comprisedbetween about 1/1 and 10/1; and c) a protic acid catalyst; 2) preparingan oil-in-water dispersion, wherein the droplet size is comprisedbetween 1 and 600 mih, and comprising: i) an oil; ii) a water medium;iii) at least an oligomeric composition as obtained in step 1); iv) atleast a cross-linker selected amongst: A) C4-Ci2 aromatic or aliphaticdi- or tri-isocyanates and their biurets, triurets, trimers andtrimethylol propane-adduct; and/or B) a di- or tri-oxiran compounds offormula A-(oxiran-2-ylmethyl) n wherein n stands for 2 or 3 and Arepresents a C₂-C₆ group optionally comprising from 2 to 6 nitrogenand/or oxygen atoms; v) optionally a C1-4 compound comprising two NH2functional groups; 3) heating said dispersion; 4) cooling saiddispersion; and 5) optionally adding to the dispersion of step 4) atleast one cationic polymer and/or urea or ethylene urea; and 6)optionally drying the final dispersion to obtain the dried core-shellmicrocapsule. The microcapsules described in the followingpublications/patents are also hereby incorporated by reference: U.S.Pat. No. 8,835,002 and U.S. Patent Publication No. 2014/0322283.

In some examples, the microcapsules may be prepared by the following: 1)preparing an oligomeric composition comprising the reaction product of,or obtainable by reacting together: a) a polyamine component in the formof melamine or of a mixture of melamine and at least one C₁₋₄ compoundcomprising two NH₂functional groups; b) an aldehyde component in theform of a mixture of glyoxal, a C₄₋₆ 2,2-dialkoxy-ethanal and optionallya glyoxalate, said mixture having a molar ratio glyoxal/C₄₋₆2,2-dialkoxy-ethanal comprised between about 1/1 and 10/1; and c) aprotic acid catalyst; 2) preparing an oil-in-water dispersion, whereinthe droplet size is comprised between 1 and 600 μm, and comprising: i)an oil; ii) a water medium; iii) at least an oligomeric composition asobtained in step 1); iv) at least a cross-linker selected amongst: A)C₄-C₁₂ aromatic or aliphatic di- or tri-isocyanates and their biurets,triurets, trimers and trimethylol propane-adduct; and/or B) a di- ortri-oxiran compounds of formula A-(oxiran-2-ylmethyl)_(n) wherein nstands for 2 or 3 and A represents a C₂-C₆ group optionally comprisingfrom 2 to 6 nitrogen and/or oxygen atoms; v) optionally a C₁₋₄ compoundcomprising two NH₂ functional groups; 3) heating said dispersion; 4)cooling said dispersion; and 5) optionally adding to the dispersion ofstep 4) at least one cationic polymer and/or urea or ethylene urea; and6) optionally drying the final dispersion to obtain the microcapsule.

The microcapsules may also be prepared by: 1) preparing an oil-in-waterdispersion, wherein the droplet size is comprised between 1 and 600 μn,and comprising at least an oligomeric composition as defined below; 2)optionally adding to the dispersion a C compound comprising two NH₂functional groups; 3) heating said dispersion; 4) cooling saiddispersion; and 5) optionally drying the final dispersion to obtain themicrocapsule. The oligomeric composition may be prepared by a reactioncomprising: 1) a poly amine component in the form of melamine or of amixture of melamine and at least one C compound comprising two N3/4functional groups; 2) an aldehyde component in the form of a mixture ofglyoxal, a C₄ _(_)6 2,2-dialkoxy-ethanal and optionally a glyoxalate,said mixture having a molar ratio glyoxal/C₄-6 2,2-dialkoxy-ethanalcomprised between about 1/1 and 10/1; and 3) a protic acid catalyst.“Glyoxal” is understood to mean both the free di-aldehyde form (e.g.OHC—CHO) and the hydrated forms (e.g. (HO)₂HC—CHO). “Glyoxalate” isunderstood to mean the glyoxalic acid or an alkaline salt of glyoxalicacid (such as OHC—COONa or OHC—COOK) or mixture thereof. The term“glyoxalate” is also understood to mean both the free aldehyde form(i.e. OHC—COOH) and the hydrated form (e.g. (HO)₂HC—COOH or(HO)₂HC—COONa). Non-limiting examples of C compound comprising two NH2functional groups include urea, IH—I,2,4-triazole-3,5-diamine andmixtures thereof.

The microcapsule may be spray-dried to form spray-dried microcapsules.The composition may also contain one or more additional delivery systemsfor providing one or more benefit agents, in addition to themicrocapsules. The additional delivery system(s) may differ in kind fromthe microcapsules. For example, wherein the microcapsule encapsulates afragrance, the additional delivery system may be an additional fragrancedelivery system, such as a moisture-triggered fragrance delivery system.Non-limiting examples of moisture-triggered fragrance delivery systemsinclude cyclic oligosaccharide, starch (or other polysaccharidematerial), starch derivatives, and combinations thereof. Saidpolysaccharide material may or may not be modified.

The compositions may also include a parent fragrance and one or moreencapsulated fragrances that may or may not differ from the parentfragrance. For example, the composition may include a parent fragranceand a non-parent fragrance. A parent fragrance refers to a fragrancethat is dispersed throughout the composition and is typically notencapsulated when added to the composition. Herein, a non-parentfragrance refers to a fragrance that differs from a parent fragranceincluded within the composition and is encapsulated with anencapsulating material prior to inclusion into the composition.Non-limiting examples of differences between a fragrance and anon-parent fragrance include differences in chemical make-up.

Other Ingredients

Additional other ingredients can also be added to the personal carecomposition for treatment of the skin, or to modify the aesthetics ofthe personal care composition as is the case with perfumes, colorants,dyes or the like. Optional materials useful in products herein can becategorized or described by their cosmetic and/or therapeutic benefit ortheir postulated mode of action or function. However, it can beunderstood that actives and other materials useful herein can, in someinstances, provide more than one cosmetic and/or therapeutic benefit orfunction or operate via more than one mode of action. Therefore,classifications herein can be made for convenience and cannot beintended to limit an ingredient to particularly stated application orapplications listed. A precise nature of these optional materials, andlevels of incorporation thereof, will depend on the physical form of thecomposition and the nature of the cleansing operation for which it is tobe used. The other materials can usually be formulated at about 6% orless, about 5% or less, about 4% or less, about 3% or less, about 2% orless, about 1% or less, about 0.5% or less, about 0.25% or less, about0.1% or less, about 0.01% or less, or about 0.005% or less of thepersonal care composition.

To further improve stability under stressful conditions such as hightemperature and vibration, densities of separate phases can be adjustedsuch that they can be substantially equal. To achieve this, low densitymicrospheres can be added to one or more phases of the personal carecomposition. Examples of personal care compositions that comprise lowdensity microspheres are described in a patent application published onMay 13, 2004 under U.S. Patent Publication No. 2004/0092415A1 entitled“Striped Liquid Personal Cleansing Compositions Containing A CleansingPhase and A Separate Phase with Improved Stability,” filed on Oct. 31,2003 by Focht, et al.

Other non-limiting ingredients that can be used in the personal carecompositions include components that can be selected from the groupconsisting of thickening agents; preservatives; antimicrobials;fragrances; chelators (e.g., such as those described in U.S. Pat. No.5,487,884 issued to Bisset, et al.); sequestrants; vitamins (e.g.,Retinol); vitamin derivatives (e.g., tocophenyl actetate, niacinamide,panthenol); sunscreens; desquamation actives (e.g., such as thosedescribed in U.S. Pat. Nos. 5,681,852 and 5,652,228 issued to Bisset);anti-wrinkle/anti-atrophy actives (e.g., N-acetyl derivatives, thiols,hydroxyl acids, phenol); anti-oxidants (e.g., ascorbic acid derivatives,tocophenol) skin soothing agents/skin healing agents (e.g., panthenoicacid derivatives, aloe vera, allantoin); skin lightening agents (e.g.,kojic acid, arbutin, ascorbic acid derivatives) skin tanning agents(e.g., dihydroxyacteone); anti-acne medicaments; essential oils;sensates; pigments; colorants; pearlescent agents; interference pigments(e.g., such as those disclosed in U.S. Pat. No. 6,395,691 issued toLiang Sheng Tsaur, U.S. Pat. No. 6,645,511 issued to Aronson, et al.,U.S. Pat. No. 6,759,376 issued to Zhang, et al, U.S. Pat. No. 6,780,826issued to Zhang, et al.) particles (e.g., talc, kolin, mica, smectiteclay, cellulose powder, polysiloxane, silicas, carbonates, titaniumdioxide, polyethylene beads) hydrophobically modified non-plateletparticles (e.g., hydrophobically modified titanium dioxide and othermaterials described in a commonly owned, patent application published onAug. 17, 2006 under Publication No. 2006/0182699A, entitled “PersonalCare Compositions Containing Hydrophobically Modified Non-plateletparticle filed on Feb. 15, 2005 by Taylor, et al.) and mixtures thereof.The multiphase personal care composition can comprise from about 0.1% toabout 4%, by weight of the personal care composition, of hydrophobicallymodified titanium dioxide. Other such suitable examples of such skinactives are described in U.S. Patent Application Publication No.2012/0009285. Other ingredients can be most typically those materialsapproved for use in cosmetics and that are described in the CTFACosmetic Ingredient Handbook, Second Edition, The Cosmetic, Toiletries,and Fragrance Association, Inc. 1988, 1992.

III. Forming a Premix

The cationic deposition polymer and the anionic microcapsule are mixedto form a premix before addition to the personal cleansing compositioncomprising at least one anionic surfactant and a carrier.

The weight ratio of the anionic microcapsule to the cationic depositionpolymer (based on the dry weight of the anionic microcapsules and thedry weight of the cationic deposition polymer) is from about 0.5:30 toabout 20:1, from about 5:15 to about 15:1, and from about 5:1 to about12:1. It is believed that too much cationic polymer may not provideenhanced and/or prolonged benefits to the benefit agent microcapsulesdue to the formation of excess cationic polymer coating on the capsulewall. This excess coating may prevent the microcapsule wall frombreaking and releasing the benefit agents.

The cationic deposition polymer may include those listed above withrespect to the structured cleansing phase. The cationic depositionpolymer premixed with the microcapsule may be the same or different thanany included in the structured cleansing phase. The cationic depositionpolymer can be, for example, polyvinyl formamide. The microcapsule canbe premixed to form a slurry comprising, by weight of the slurry, fromabout 0.01% to about 5%, from about 0.05% to about 2% or even from about0.1% to about 1%, of a polyvinyl formamide; from about 0% to about 5%MgCl₂; from about 0% to about 1% xanthan gum; and a carrier.

The cationic deposition polymer for use in the microcapsule premix canhave a molecular weight from about 1,000 Da to about 50,000,000 Da; fromabout 5,000 Da to about 25,000,000 Da; from about 10,000 Da to about10,000,000 Da; or even from about 300,000 Da to about 2,000,000. Thecationic deposition polymer can also have a charge density from about 1meq/g to about 23 meq/g, from about 1 meq/g to about 16 meq/g, fromabout 1 meq/g to about 10 meq/g, or from 1 meq/g to about 4 meq/g.

IV. Method of Manufacture

The personal cleansing compositions herein may be prepared by a processcomprising: 1) combining an anionic microcapsule with a cationicdeposition polymer to form a premix; and 2) adding the premix to acomposition comprising a surfactant, a benefit agent comprising atriglyceride, and a carrier.

V. Product Forms

The personal cleansing compositions may be in the form of rinse-offproducts or leave-on products, and can be formulated in a wide varietyof product forms, including but not limited to creams, gels, emulsions,mousses, body washes, shampoos, conditioners, and sprays.

As noted herein, the personal cleansing composition may include astructured cleansing phase and a benefit phase. In some examples, thestructured cleansing phase and the benefit phase are in physicalcontact. In some examples, the personal cleansing composition may be amultiphase personal cleansing composition where the structured cleansingphase and the benefit phase are be blended or mixed to a significantdegree, but remain physically distinct such that the physicaldistinctiveness is undetectable to the naked human eye.

In some examples, the personal cleansing composition may be a multiphasepersonal cleansing composition where the structured cleansing phase andthe benefit phase are made to occupy separate but distinct physicalspaces inside a package in which the phases are stored. In suchexamples, the structured cleansing phase and the benefit phase can bestored such that the phases are not in direct contact with one another.In some examples, the personal cleansing composition can be a multiphasepersonal cleansing composition where the structured cleansing phase andthe benefit phase are in physical contact and have a striped or marbledconfiguration.

In some examples, the personal cleansing composition can include acombination of one or more of the above multiphase personal cleansingcompositions. In some examples, one blended multiphase personalcleansing composition can be stacked as stripes with another blendedmultiphase personal cleansing composition. And in other examples, theblended multiphase personal cleansing compositions distinguishable bycolor can be stacked as stripes wherein the blended multiphase personalcleansing compositions can be otherwise similar.

VI. Test Methods

It is understood that the test methods that are disclosed in the TestMethods Section of the present application should be used to determinethe respective values of the parameters of Applicants' invention as suchinvention is described and claimed herein.

C log P

The “calculated log P” (C log P) is determined by the fragment approachof Hansch and Leo (cf., A. Leo, in Comprehensive Medicinal Chemistry,Vol. 4, C. Hansch, P. G. Sammens, J. B. Taylor, and C. A. Ramsden, Eds.P. 295, Pergamon Press, 1990, incorporated herein by reference). C log Pvalues may be calculated by using the “C LOG P” program available fromDaylight Chemical Information Systems Inc. of Irvine, Calif. U.S.A.

Boiling Point

Boiling point is measured by ASTM method D2887-04a, “Standard TestMethod for Boiling Range Distribution of Petroleum Fractions by GasChromatography,” ASTM International.

Zeta Potential

-   (1) Equipment specifications: Malvern Zeatasizer Nano Model ZEN3600    Sample cell, disposable capillary cell (green cell)-   (2) Use Duke standards to measure the PSD, and use it to measure the    zeta potential to assure that the instrument is functioning    properly.-   (3) Flush a DTS1060 capillary cell with 1-2 mL ethanol, then with DI    water to prepare the capillary cell.-   (4) Sample preparation: first, filter 20 mL DI water through 0.2    micron filter into a 20 mL vial. Add 1 drop (50 microliters of 30 wt    % solids suspension into the vial and invert the sample back and    forth gently until the particulate suspension is homogeneously    dispersed in the vial. Next, rinse a DTS1060 green disposable zeta    cell with 1-2 mL of DI water, then use a syringe to transfer the    sample solution from the vial into the zeta cell, making sure that    no air bubbles are present in the cell. Fill the cell to the top,    then place a cap on the cell outlet and inlet (again making sure no    air bubbles are present in the sample cell). Then, place the cell in    the sample chamber, with the electrodes facing the sides of the    system. Finally, place the sample cell in the instrument.-   (5) Conditions for the run:    -   a. Refractive index=1.35 (this number may vary for suspensions.        One can measure the refractive index for any particulate        suspension using a refractometer)    -   b. Temperature=25 degrees Centigrade    -   c. Equilibration time=1 minute    -   d. Smoluchowski model to be used to calculate the zeta potential-   (6) Measure each sample in triplicate. The result from the    instrument is reported as Zeta Potential in milliVolts, with no    extrapolation.

VII. Examples

The following examples illustrate the present invention. The exemplifiedcompositions may be prepared by conventional formulation and mixingtechniques. It will be appreciated that other modifications of thepresent invention within the skill of those in the art may be undertakenwithout departing from the spirit and scope of this invention. Allparts, percentages, and ratios herein are by weight unless otherwisespecified. Some components may come from suppliers as dilute solutions.The amount stated reflects the weight percent of the active material,unless otherwise specified.

The following are non-limiting examples of microcapsules andcompositions described herein.

I: Personal Care Composition Example A Example B Example C SodiumTrideceth Sulfate 9.59% 9.08% 9.08% (sulfated from Trideceth-2, Stepan)Cocoamidopropyl Betaine 2.87% 2.71% 2.71% Trideceth-3 1.53% 1.45% 1.45%Sodium Chloride 4.42% 4.19% 4.19% Guar 0.50% 0.47% 0.47%Hydroxypropyltrimonium Chloride (N-Hance CG-17 from Aqualon) Xanthan Gum0.34% 0.32% 0.32% (Keltrol 1000 from CP Kelco) Acrylates/C10-30 0.03%0.029%  0.029%  Alkylacrylate Cross Polymer (Aqupec SER-300C fromSumitomo) Methyl chloro 0.033%  0.033%  0.033%  isothiazolinone andmethyl isothiazolinone (Kathon CG, Rohm & Haas) EDTA (Dissolvine NA 2x)0.31% 0.31% 0.31% Sodium Benzoate 0.14% 0.14% 0.14% Perfume  1.0%  1.0% 1.0% RBD Soybean Oil 4.85% 9.70% — Glyceryl Oleate 0.05% 0.10% 0.20%BHT  0.1% 0.20% Petrolatum — —  9.8% Perfume Microcapsule  0.8%  0.8% 0.8% Slurry of Examples 1, 2, 3, 4 or 5 Citric Acid, titrate pH = pH =pH = 5.7 ± 0.2 5.7 ± 0.2 5.7 ± 0.2 Water and minors Q.S. Q.S. Q.S.

Example 1. Nonionic Microcapsule

An oil solution, consisting of 75 g Fragrance Oil scent A, 75 g ofIsopropyl Myristate, 0.6 g DuPont Vazo-52, and 0.4 g DuPont Vazo-67, isadded to a 35° C. temperature controlled steel jacketed reactor, withmixing at 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogenblanket applied at 100 cc/min. The oil solution is heated to 75° C. in45 minutes, held at 75° C. for 45 minutes, and cooled to 60° C. in 75minutes. A second oil solution, consisting of 37.5 g Fragrance Oil, 0.5g tertiarybutylaminoethyl methacrylate, 0.4 g 2-carboxyethyl acrylate,and 20 g Sartomer CN975 (hexafunctional urethane-acrylate oligomer) isadded when the first oil solution reached 60° C. The combined oils areheld at 60° C. for an additional 10 minutes. Mixing is stopped and awater solution, consisting of 56 g of 5% active polyvinyl alcohol Celvol540 solution in water, 244 g water, 1.1 g 20% NaOH, and 1.2 g DuPontVazo-68WSP, is added to the bottom of the oil solution, using a funnel.Mixing is again started, at 2500 rpm, for 60 minutes to emulsify the oilphase into the water solution. After milling is completed, mixing iscontinued with a 3″ propeller at 350 rpm. The batch is held at 60° C.for 45 minutes, the temperature is increased to 75° C. in 30 minutes,held at 75° C. for 4 hours, heated to 90° C. in 30 minutes and held at90° C. for 8 hours. The batch is then allowed to cool to roomtemperature. The finished microcapsules have a median particle size of6.4 microns, a broadness index of 1.3, and a zeta potential of negative0.5 millivolts, and a total scent A concentration of 27.6 wt %.

Example 2. Anionic Microcapsule, Large Particle Size

Capsules are made using identical materials, compositions, and processconditions as in Example 1 with the following exceptions: 1 gram ofVazo-52, 0.8 grams of Vazo-67, 0.3 grams of tertiarybutylaminoethylmethacrylate, 0.25 grams of 2-carboxyethyl acrylate, and 12 grams ofSartomer CN975 as compositional differences in the oil phase; and 22grams of 25% active Colloid 351, and 308 grams of water as compositionaldifferences in the water phase. All other mixing and process conditionerremains the same. The finished microcapsules have a median particle sizeof 10.7 microns, a broadness index of 1.5, and a zeta potential ofnegative 60 milivolts, and a total scent A concentration of 34.9 wt %.

Example 3. Anionic Microcapsule, Small Particle Size

Capsules are made using identical materials, compositions, and processconditions as in Example 1 with the following exceptions: 1 gram ofVazo-52, 0.8 grams of Vazo-67, 1.5 grams of tertiarybutylaminoethylmethacrylate, 1.2 grams of 2-carboxyethyl acrylate, and 60 grams ofSartomer CN975 as compositional differences in the oil phase; and 68grams of 25% active Colloid 351, and 282 grams of water as compositionaldifferences in the water phase. All other mixing and process conditionerremains the same. The finished microcapsules have a median particle sizeof 1.4 microns, a broadness index of 1.2, and a zeta potential ofnegative 60 milivolts, and a total scent A concentration of 20.7 wt %.

Example 4. Anionic Microcapsule

Capsules are made using identical materials, compositions, and processconditions as in Example 2 with the following exceptions: 1 gram oftertiarybutylaminoethyl methacrylate, 0.8 grams of 2-carboxyethylacrylate, and 40 grams of Sartomer CN975 as compositional differences inthe oil phase; and 22 grams of 25% active Colloid 351, and 282 grams ofwater as compositional differences in the water phase. All other mixingand process conditioners remain the same. The finished microcapsuleshave a median particle size of 4.8 microns, a broadness index of 1.3,and a zeta potential of negative 60 milivolts, and a total scent Aconcentration of 23.5 wt %.

Example 5. 90 wt % Core/10 wt % Wall, Scent A Capsules, 20% PartitioningModifier

An oil solution, consisting of 128.4 g of perfume Oil, 32.1 g isopropylmyristate, 0.86 g DuPont Vazo-67, 0.69 g Wako Chemicals V-501, is addedto a 35° C. temperature controlled steel jacketed reactor, with mixingat 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogen blanketapplied at 100 cc/min. The oil solution is heated to 70° C. in 45minutes, held at 75° C. for 45 minutes, and cooled to 50° C. in 75minutes. This mixture is hereafter referred to as oil solution A.

In a reactor vessel, an aqueous solution is prepared consisting of 300 gof deionized water to which is dispersed in 2.40 grams of Celvol 540polyvinyl alcohol at 25° C. The mixture is heated to 85° C. and heldthere for 45 minutes. The solution is cooled to 30° C. 1.03 grams ofWako Chemicals V-501 initiator is added, along with 0.51 grams of a 40%sodium hydroxide solution. The solution is then heated to 50° C., andthe solution is maintained at that temperature.

To oil solution A, add 0.19 grams of tert-butyl amino ethyl methacrylate(Sigma Aldrich), 0.19 grams of beta-carboxy ethyl acrylate (SigmaAldrich), and 15.41 grams of Sartomer CN975 (Sartomer, Inc.). Mix theacrylate monomers into the oil phase for 10 minutes. This mixture ishereafter referred to as oil solution B. Use a Caframo mixer with a4-blade pitched turbine agitator.

Start a nitrogen blanket on top of the aqueous solution in reactor.Start transferring oil solution B into the aqueous solution in thereactor with minimal mixing. Increase the agitation of mixing to1800-2500 rpm for a period of 60 minutes to emulsify the oil phase intothe water solution. After milling is completed, mixing is continued witha 3″ propeller at 350 rpm. The batch is then held at 50° C. for 45minutes. The temperature is then increased to 75° C. in 30 minutes, heldat 75° C. for 4 hours, heated to 95° C. in 30 minutes and held at 95° C.for 6 hours. The batch is then allowed to cool to room temperature.

A perfume encapsulated, called Scent A, is utilized to prepare Examples1-5. The table below lists the ingredients, and their properties. Table5 provides the C log P breakdown of the perfume oil encapsulated.

Disper- H- Boiling sion Bond Polarity Point Scent A ClogP (MPa^(1/2))(MPa^(1/2)) (MPa^(1/2)) (° C.) 3,6-Nonadien-1-ol 2.45 15.76 14.28 4.39213 Allyl Caproate 3.03 15.63 6.25 4.13 198 Allyl Heptoate 3.57 15.66.04 3.81 216 Beta Gamma Hexenol 1.3 15.79 14.73 5.45 155 Cis 3 HexenylAcetate 2.18 15.75 6.57 4.55 167 Cis-6-Nonen-1-OL FCC 2.7 15.78 13.464.01 214 Cyclo Galbanate 2.54 17.15 6.84 3.9 273 Cymal 3.62 17.88 4.165.6 290 Dihydro Myrcenol 3.08 15.54 10.78 3.6 195 Dimethyl Benzyl 4.0917.76 4.39 4.99 270 Carbinyl Butyrate Ethyl 2 Methyl 2.55 15.58 5.973.64 157 Pentanoate Ethyl Acetoacetate 0.15 16.16 8.7 8.12 179 EthylCaproate FCC 2.62 15.86 6.26 3.61 165 Ethyl Maltol 0.17 18.14 9.66 6.3274 Ethyl Oenanthate 3.2 15.71 6.09 3.27 183 Ethyl-2-Methyl 1.91 15.686.18 3.92 133 Butyrate Florhydral 3.59 18.04 4.19 5.57 295Hexamethylindanopyran 5.43 15.68 3.59 6.11 398 Gamma Decalactone 3.2317.32 6.36 11.78 211 Hexyl Acetate 2.64 15.86 6.44 3.7 165 Ionone Beta4.02 16.54 4.37 5.65 267 Jasmolactone 2.36 17.59 6.44 6.47 219 Liffarome2.14 15.61 7.32 3.23 167 Ligustral Or Triplal 1.78 17.28 5.13 7.17 199Linalool 2.44 15.38 11.14 3.72 204 Melonal 2.09 15.55 4.86 6.65 182Nectaryl 4.18 17.76 4.33 8.31 319 Para Hydroxy Phenyl 1.58 18.62 12.328.72 294 Butanone Pino Acetaldehyde 2.98 17.06 4.96 6.03 261 PrenylAcetate 1.12 15.42 6.37 5.32 145 Thesaron 3.84 16.65 5.07 4.57 216Undecalactone 3.75 17.24 6.21 11.1 228 Undecavertol 3.06 15.41 10.393.49 242 Verdox 3.87 16.96 5.34 3.66 223 Verdural B Extra 3.21 15.465.71 3.74 193

Examples D-L

The base surfactant composition can be prepared by standard mixingtechnique. First, add water to a container. Then, add the followingingredients with continuous mixing: sodium chloride, guar hydroxypropyltrimoium chloride, cocoamidopropyl betaine, sodium trideceth sulfatesodium lauryl sulfate. Prepare a premix of acrylates/C10-C30alkylacrylates cross polymer and Xanthan gum with trideceth-3. Add thepremix to the main container with mixing. Add EDTA, sodium Benzoate tothe main container. Adjust the pH to 5.7 using 50% citric acid solution.Add Kathon CG. Keep mixing until homogeneous.

Base Surfactant Sodium Trideceth Sulfate 10.3% (sulfated fromTrideceth-2, Stepan) Cocoamidopropyl Betaine 3.08% Trideceth-3 1.64%Sodium Chloride 4.75% Guar Hydroxypropyltrimonium Chloride 0.53%(N-Hance CG-17 from Aqualon) Xanthan Gum 0.37% (Keltrol 1000 from CPKelco) Acrylates/C10-30 Alkylacrylate Cross Polymer 0.033%  (AqupecSER-300C from Sumitomo) Methyl chloro isothiazolinone and methylisothiazolinone 0.0007%  (Kathon CG, Rohm & Haas) EDTA (Dissolvine NA2x) 0.15% Sodium Benzoate 0.34% Citric Acid, titrate pH = 5.7 Water andMinors Q. S.Examples D-L can be prepared with standard mixing techniques. First, addthe base surfactant to a container. Then, prepare a premix of soybeanoil, glyceryl monooleate, BHT in a separate container by heating to 50°C. with mixing. Then, add the premix to the surfactant phase withcontinuous mixing. Then add the perfume, and PMC slurry (where utilized)into the batch. Keep mixing until homogenous.

Example D Example E Example F I) Base Surfactant 91.8% 91.8% 91.8% II)Lipid Phase RBD Soybean Oil 6.79% 6.79% 6.79% Glyceryl Oleate 0.07%0.07% 0.07% BHT 0.14% 0.14% 0.14% III) Perfume and PMC Neat Perfume 1.2%  1.0%  1.0% Perfume Microcapsule A —  0.2% — (anionicmicrocapsules) Perfume Microcapsule B — —  0.2% (premix containinganionic microcapsules & cationic polymer) Arm Wash Perfume HeadspaceTesting Results Initial Perfume GC 1 1.3 1.9 Headspace (index to NoMicrocapsule Control) Perfume GC 1 1.4 1.3 Headspace after one Hour(pre-rub) (index to No Microcapsule Control) Perfume GC 1 1.5 10.6Headspace after one Hour (post-rub) (index to No Microcapsule Control)Product to Water Dilution (1:9) Ratio Optical Microscopy LipidCoacervate Observed Observed (10x DIC Mode) Only individual microcapsulemicrocapsules clusters within the floating in lipid/polymer aqueoussolution coacervate Example G No PMC Control Example H Example I ExampleJ Example K Example L IV) Base Surfactant 91.8% 91.37%  91.29%  91.37% 91.27%  91.27%  V) Lipid Phase RBD Soybean Oil 6.79% 6.79% 6.79% 6.79%6.79% 6.79% Glyceryl Oleate 0.07% 0.07% 0.07% 0.07% 0.07% 0.07% BHT0.14% 0.14% 0.14% 0.14% 0.14% 0.14% VI) Perfume and PMC Neat Perfume 1.2%  1.0%  1.0%  1.0%  1.0%  1.0% Perfume Microcapsule A — 0.63% — — —— (based on total oil content) (0.2% oil) (anionic PMC) PerfumeMicrocapsule B — — 0.71% (based on total oil content) (0.2% oil)(nonionic PMC) Perfume Microcapsule C 0.63% (based on total oil content)(0.2% oil) (cationic PMC) Perfume Microcapsule D 0.73% (based on totaloil content) (0.2% oil) (anionic PMC + cationic polymer) PerfumeMicrocapsule E 0.73% (based on total oil content) (0.2% oil) (anionicPMC + cationic polymer) Product to Water Dilution (1:9) Ratio OpticalMicroscopy (10x DIC Mode) No PMC No No No Yes Yes PMC Clustering withCoacervate Control Clustering Clustering Clustering Corresponding FIG. 12 3 4 5 6

Additional information on the microcapsules utilized in Examples H-L islisted below.

Perfume Microcapsule A (anionic PMC) Properties Particle size (volumeaverage) 11.43 microns Particle size distribution (volume average)  1.75pH  5.82 % Total Oil 31.58% % Solids 44.65% Core Description 80/20Perfume/ Isopropyl Myristate Core/Wall Ratio 90/10 Colloid Descriptor 0.8% PVOH Others All beta C—anionic Perfume Microcapsule B (nonionicPMC) Properties Particle size (volume average) 11.15 microns Particlesize distribution (volume average)  1.59 pH  5.57 % Total Oil 28.15% %Solids 46.30% Core Description 70/30 Perfume/ Isopropyl MyristateCore/Wall Ratio 90/10 Colloid Descriptor  0.8% PVOH Others CN975/TBAEMA/Beta-C Perfume Microcapsule C (cationic PMC) Properties Particle size(volume average) 11.15 microns Particle size distribution (volumeaverage)  1.79 pH  6.18 % Total Oil 31.86% % Solids 45.03% CoreDescription 80/20 Perfume/ Isopropyl Myristate Core/Wall Ratio 90/10Colloid Descriptor  0.8% PVOH Others All TB AEMA- cationic PerfumeMicrocapsule D (anionic PMC + cationic polymer) Particle size (volumeaverage) 19.66 microns Particle size distribution (volume average)  1.56pH  5.28 % Total Oil 27.26% Shell Descriptor Melamine FormaldehydeCationic Deposition Polymer: Polyvinyl Formamide  0.58% PerfumeMicrocapsule E (anionic PMC + cationic polymer) Particle size (volumeaverage) 17.64 microns Particle size distribution (volume average)  1.54pH  5.33 % Total Oil 27.29% Shell Descriptor Melamine FormaldehydeCationic Deposition Polymer: Polyvinyl Formamide  0.58%

It should be understood that every maximum numerical limitation giventhroughout this specification includes every lower numerical limitation,as if such lower numerical limitations were expressly written herein.Every minimum numerical limitation given throughout this specificationwill include every higher numerical limitation, as if such highernumerical limitations were expressly written herein. Every numericalrange given throughout this specification will include every narrowernumerical range that falls within such broader numerical range, as ifsuch narrower numerical ranges were all expressly written herein.

The dimensions and values disclosed herein are not to be understood asbeing strictly limited to the exact numerical values recited. Instead,unless otherwise specified, each such dimension is intended to mean boththe recited value and a functionally equivalent range surrounding thatvalue. For example, a dimension disclosed as “40 mm” is intended to mean“about 40 mm.”

Every document cited herein, including any cross referenced or relatedpatent or application and any patent application or patent to which thisapplication claims priority or benefit thereof, is hereby incorporatedherein by reference in its entirety unless expressly excluded orotherwise limited. The citation of any document is not an admission thatit is prior art with respect to any invention disclosed or claimedherein or that it alone, or in any combination with any other referenceor references, teaches, suggests or discloses any such invention.Further, to the extent that any meaning or definition of a term in thisdocument conflicts with any meaning or definition of the same term in adocument incorporated by reference, the meaning or definition assignedto that term in this document shall govern.

While particular arrangements of the present invention have beenillustrated and described, it would be obvious to those skilled in theart that various other changes and modifications can be made withoutdeparting from the spirit and scope of the invention. It is thereforeintended to cover in the appended claims all such changes andmodifications that are within the scope of this invention.

What is claimed is:
 1. A method of making a microcapsule-containingpersonal care composition comprising: making a benefit phase comprisingat least one triglyceride oil selected from the group consisting ofolive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almondoil, palm oil, coconut oil, palm kernel oil, and mixtures thereof at alevel that does not impair the formation of the clusters ofmicrocapsules upon dilution of said composition with water and amicrocapsule premix, wherein the microcapsule premix comprises a firstcationic deposition polymer and a plurality of anionic microcapsuleswherein the Zeta potential of said microcapsules is less than negative0.5 millivolts and the weight ratio of said microcapsules to cationicpolymer is from about 5:1 to about 12:1; and combining the benefit phasewith a structured cleansing phase comprising from about 2% to about 50%,by weight of the personal care composition, of an anionic surfactant. 2.The method of making the personal care composition of claim 1, whereinthe structured cleansing phase and the benefit phase are in physicalcontact with each other.
 3. The method of making the personal carecomposition of claim 1, wherein the anionic surfactant is selected fromthe group consisting of ammonium lauryl sulfate, ammonium laurethsulfate, sodium lauryl sulfate, sodium laureth sulfate, potassiumlaureth sulfate, sodium lauryl sarcosinate, sodium lauroyl sarcosinate,lauryl sarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, potassiumlauryl sulfate, and combinations thereof.
 4. The method of making thepersonal care composition of claim 1, wherein the structured cleansingphase further comprises a second cationic deposition polymer.
 5. Themethod of making the personal care composition of claim 1, wherein theanionic surfactant comprises sodium laureth(n) sulfate.
 6. The method ofmaking the personal care composition of claim 1, wherein themicrocapsules comprise a core material and a wall material, the wallmaterial comprising those formed from melamine-formaldehyde orurea-formaldehyde condensates, melamine-resorcinol or urea-resorcinolcondensates, aminoplasts, gelatin, polyurethane, polyamide, polyolefin,polysaccharide, protein, silicone, lipid, modified cellulose, gums,polyacrylate, polyphosphate, polystyrene, polyesters, or a combinationthereof.
 7. The method of making the personal care composition of claim1, wherein the first cationic deposition polymer has a molecular weightof 300,000 Da to 2,000,000 Da.
 8. The method of making the personal carecomposition of claim 7, wherein the first cationic deposition polymercomprises polyvinyl formamide.
 9. The method of making the personal carecomposition of claim 8, wherein the anionic microcapsules comprise ashell comprising polyacrylate, melamine formaldehyde, or a combinationthereof.
 10. The method of making the personal care composition of claim9, wherein the anionic microcapsules comprise a core comprising perfume.11. The method of making the personal care composition of claim 10,wherein the weight ratio of the anionic microcapsule to the firstcationic deposition polymer is from about 5:1 to about 12:1.
 12. Themethod of making personal care composition of claim 11, wherein thecationic deposition polymer comprises a polyvinyl formamide.
 13. Themethod of making the personal care composition of claim 11, wherein thecationic deposition polymer has a charge density of about 1 meq/g toabout 4 meq/g.
 14. A method of making a microcapsule-containing personalcare composition comprising: making a microcapsule premix by combining afirst cationic deposition polymer and a plurality of anionicmicrocapsules wherein the Zeta potential of said microcapsules is lessthan negative 0.5 millivolts and the weight ratio of said microcapsulesto cationic polymer is from about 5:1 to about 12:1; and combining thepremix with a benefit phase comprising at least one triglyceride oilselected from the group consisting of olive oil, sunflower oil, soybeanoil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, palmkernel oil, and mixtures thereof at a level that does not impair theformation of the clusters of microcapsules upon dilution of saidcomposition with water and a structured cleansing phase comprising fromabout 2% to about 50%, by weight of the personal care composition, of ananionic surfactant.
 15. The method of claim 14, wherein the benefitphase and structured cleansing phase are combined prior to addition ofthe microcapsule premix.
 16. The method of claim 14, wherein themicrocapsule premix is added to the benefit phase prior to addition ofthe cleansing phase.
 17. The method of claim 14, wherein the wherein theweight ratio of the anionic microcapsule to the cationic depositionpolymer is from about 5:1 to about 12:1.
 18. The method of claim 17,wherein the cationic deposition polymer comprises cationic depositionpolymer comprises polyvinyl formamide, starch, guar, cellulose, or acombination thereof.